Vulnerability Description
dicourse-calendar is a plugin for the Discourse messaging platform which adds the ability to create a dynamic calendar in the first post of a topic. Improper escaping of event titles could lead to Cross-site Scripting (XSS) within the 'email preview' UI when a site has CSP disabled. Having CSP disabled is a non-default configuration, so the vast majority of sites are unaffected. This problem is resolved in the latest version of the discourse-calendar plugin. Users are advised to upgrade. Users unable to upgrade should ensure CSP is enabled on the forum.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Discourse | Discourse Calendar | <= 2023-10-16 |
Related Weaknesses (CWE)
References
- https://developer.mozilla.org/en-US/docs/Web/HTTP/CSPThird Party Advisory
- https://github.com/discourse/discourse-calendar/commit/9788310906febb36822d6823dPatch
- https://github.com/discourse/discourse-calendar/security/advisories/GHSA-3fwj-f6Vendor Advisory
- https://developer.mozilla.org/en-US/docs/Web/HTTP/CSPThird Party Advisory
- https://github.com/discourse/discourse-calendar/commit/9788310906febb36822d6823dPatch
- https://github.com/discourse/discourse-calendar/security/advisories/GHSA-3fwj-f6Vendor Advisory
FAQ
What is CVE-2023-43658?
CVE-2023-43658 is a vulnerability with a CVSS score of 8.0 (HIGH). dicourse-calendar is a plugin for the Discourse messaging platform which adds the ability to create a dynamic calendar in the first post of a topic. Improper escaping of event titles could lead to Cro...
How severe is CVE-2023-43658?
CVE-2023-43658 has been rated HIGH with a CVSS base score of 8.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-43658?
Check the references section above for vendor advisories and patch information. Affected products include: Discourse Discourse Calendar.